1400344440 has 64 divisors (see below), whose sum is σ = 4582949760. Its totient is φ = 339477120.

The previous prime is 1400344411. The next prime is 1400344469. The reversal of 1400344440 is 444430041.

It is an interprime number because it is at equal distance from previous prime (1400344411) and next prime (1400344469).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1400344440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529114 + ... + 531753.

It is an arithmetic number, because the mean of its divisors is an integer number (71608590).

Almost surely, 2^1400344440 is an apocalyptic number.

1400344440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400344440 is an abundant number, since it is smaller than the sum of its proper divisors (3182605320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1400344440 is a wasteful number, since it uses less digits than its factorization.

1400344440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060892 (or 1060888 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1400344440 is about 37421.1763577790. The cubic root of 1400344440 is about 1118.7806777060.

Adding to 1400344440 its reverse (444430041), we get a palindrome (1844774481).

The spelling of 1400344440 in words is "one billion, four hundred million, three hundred forty-four thousand, four hundred forty".